Construction for the improved distribution of air, lean gas and waste gas between hig and low level ports in high chambered horizontal coke ovens



J. VAN ACKEREN 3,385,767

COKE OVENS 4 Sheets-Sheet 1 May 28, 1968 CONSTRUCTION FOR THE IMPROVED DISTRIBUTION OF AIR, LEAN GAS AND WASTE GAS BETWEEN HIGH AND LOW LEVEL PORTS IN HIGH CHAMBERED HORIZONTAL Original Filed Jan. 9, 1963 E Run INVENTOR. J0 .35 Ph 'ww flea 5.2.511

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CONSTRUCTION FOR THE IMPROVED DISTRIBUTION OF AIR, LEAN GAS AND WASTE GAS BETWEEN HIGH AND LOW LEVEL PORTS IN HIGH CHAMBERED HORIZONTAL COKE OVENS Original Filed Jan. 9, 1963 4 Sheets-Sheet z TEMP. IN FLUE.

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May 28, 1968 J. VAN ACKEREN 5 CONSTRUCTION FOR THE IMPROVED DISTRIBUTION OF AIR, LEAN GAS AND WASTE GAS BETWEEN HIGH AND LOW LEVEL PORTS IN HIGH CHAMBERED HORIZONTAL COKE OVENS Original Filed Jan. 9, 1963 4 Sheets-Sheet 3 BLAST FURNACE- GAS MAI J INVENTOR. Jam/w vmv 6 0x525! M06; \Q. M.

3,385,767 LEAN May 28, 1968 J. VAN ACKEREN CONSTRUCTION FOR THE IMPROVED DISTRIBUTION OF AIR GAS AND WASTE GAS BETWEEN HIGH AND LOW LEVEL PORTS IN HIGH CHAMBERED HORIZONTAL COKE OVENS 4 Sheets-Sheet 4 Original Filed Jan.

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Jose-1w 144M ficmszan/ M 62 GAS OFF GAS OFF J GAS ON aiadw United States Patent 3 385,767 CONSTRUCTION FGRTHE IMPROVED DISTRIBU- TION 0F AER, LEAN GAS AND WASTE GAS BE- TWEEN HIGH AND LOW LEVEL PORTS IN HIGH CHAMBERED HORIZONTAL COKE OVENS Joseph Van Ackeren, Pittsburgh, Pa., assignor to Koppers Company, lnc., a corporation of Delaware Continuation of appiication Ser. No. 250,338, Jan. 9, 1963. This application Dec. 5, 1966, Ser. No. 599,672 7 Claims. (Cl. 202-141) ABSTRACT OF THE DISCLOSURE A regenerative horizontal coke oven battery with coking chambers of substantial height. The coking chambers extend cross-wise of the battery and have heating chambers on opposite sides thereof to supply heat to the coking chambers. The heating chambers are divided into separate heating flues by transverse walls and the flues have high level and low level burners. Regenerators are located beneath the coking chambers and are divided into separate compartments by transverse walls. The transverse walls of the regenerator compartments are arranged intermediate the transverse walls of the heating chambers. One regenerator compartment is connected to the high level burners in a pair of adjacent flues on opposite sides of the coking chamber so that the compartment may supply fluid to four high level burners in four separate heating flues. Another compartment in the same regenerator is connected by passageways to low level burners in a pair of adjacent flues on opposite sides of the coking chamber so that the other regenerator compartment may supply fluid to four low level burners.

This application is a continuation of application Ser. No. 250,338, filed Jan. 9, 1963, now abandoned.

This invention relates to improvements in the construction and general operation of cross-regenerative horizontal coking retort ovens having coking chambers of substantial increase in height over the height of conventional coking chambers and employing both low and high combustion devices in each of the flame flucs comprising the heating walls, and more particularly, to the structural arrangement for the distribution of air, lean gas and Waste gas to any given flue and the control over the apportionment of these fluids between the high and level combustion devices located therein thereby adjustin g the rate of combustion in the upper and lower regions of the given flue relative to each other.

The conventional coke oven battery contains coking chambers each of which is about forty feet long, about eighteen inches wide and about thirteen feet high. When charged, each coking chamber contains about eighteen tons of coal. The primary objective of the constructers of coke oven structures has for some time been to substantially increase the production capacity of by-product coke ovens to reduce the unit production cost of coke to maintain for this material its competitive position in the metallurgical industries.

A number of arrangements and proposals have been offered in this regard, however, no one of these attempts has met with any great degree of success, because the problem is not simply one soluble by building higher or wider coke ovens into which larger quantities of coal can be charged but, rather, one soluble only by insuring that whatever coal is charged into these larger coking chambers will be converted to coke of uniform quality having the structure and composition required for use in the metallurgical industries. In order to produce coke of this quality it is important that strict uniformity be maintained in the distribution of heat to the coal in the coking 3,385,767 Patented May 28, 1968 chamber during the coking process. True, this has been the same problem that has faced the art for many years in the construction of coke ovens of conventional capacity and after much study and design this problem of uniform heating was eventually solved for the case of coke ovens of conventional capacity. However, this know-how may be directly applied only in the design and operation of those ovens in which the aforementioned conventional height of about thirteen feet or less is maintained.

Investigations have shown that changing the Width of the coking chamber has essentially no effect on coke production. It is clearly acknowledged that increasing the width of the coking chamber will not increase the output of coke per unit of time and, if the coking chamber is narrowed, less coke tonnage can be pushed for the same pushing cost as is now expended with standard 18" oven chambers. The only solution is to design coking chambers so that greater coke tonnage can be pushed than is now pushed from standard coking chambers but with little or no increase in pushing expense. It appears therefore that the only approach to the more economical production of metallurgical coke lies in increasing the capacity of the coking chambers by increasing the height and length thereof.

With the acceptance of this fact, it becomes manifest that an entirely new empirical approach must be developed to insure the uniform distribution of heat to the coals in these higher-than-conventional coking chambers, particularly, in those instatnces in which the height of the coking chamber has been increased by as much as fifty per cent.

The construction and modes of operation proposed for coking chambers of such increased height to date have been unable to provide this requisite uniformity of heat distribution, which is essential not only to the production of coke suitable for metallurgical applications, but also to the successful distillation of such by-products of cokemaking as benzol and toluol, which in addition to other lay-product chemicals are peculiarly subject to destruction during this process. Further, once the operator is given a pushing schedule to meet, unless he can count on uniform heat distribution to the coal in the coking chamber at predictable rates, then the quality of the product leaving the coking chambers according to the selected pushing schedule will not be controllable and the operator cannot consistently produce an optimum grade of coke.

It has logically been concluded by many skilled in the art that to uniformly heat walls of increased height sole reliance cannot be placed upon combustion from flues near the base of the flame flues. Supplementary heat must also be supplied at a higher level and, for this reason, high level combustion facilities in addition to the conventional llow level combustion facilities have been employed. Thus, it is with the proper proportioning of fuel gas and air between these high and low level combustion devices in the same flue and the consistent and reliable external control thereof that this invention is concerned.

The primary object of the present invention is, therefore, the provision of improved structural arrangements and operating procedures for effecting the proper distribution of air, lean gas and waste gas in the battery and externally controlling the apportionment thereof between high and low level ports in the same flue, which ports comprise the above-mentioned combustion devices, to promote uniform distribution to the coke oven chambers of the heat produced by combustion in the flame flues.

In brief, this invention consists in providing means for insuring the distribution of rated quantities of air and/or lean gas to high and low level ports in each flame flue of a heating wall for a by-product coke oven battery having coking chambers of greater-than-conventional height to produce substantially uniform heating over the extent of the heating wall surface to effect thereby suflicient uniformity of heat distribution to the coal in the coking chamber to produce high quality metallurgical coke and also in providing externally regulable means for adjusting the rated quantities to be delivered by the above described distribution means.

In the accompanying drawings forming part of this specification, there are shown for purposes of illustration, both a gun flue-fired battery and an underjet battery, which batteries are of the Koppers-Becker design (crossover flue interconnected combustion flue heating system) and contain those modifications to the distribution and apportionment of air, lean gas and waste heat required in the practice of the present invention. In every instance, each flue shown contains both a high level and a low level combustion device. The low level combustion device is shown as a single port or low burner, the high level combustion device as a pair of high level ports opening into each flame flue. However, this invention is not limited in its application to the two specific types of ovens illustrated in the drawings or to the specific arrangement of ports, but is broadly applicable to the heating system for other cross-regenerative coking retort ovens such as may employ the single-divided or the double-divided flue systems, so long as the means disclosed herein for delivering fluids to, apportioning these fluids and externally controlling this apportionment of fluids between the high level combustion device and the low level combustion device in each flue are provided. One each of the high level combustion devices and one each of the low level combustion devices are present in each flame flue, however, except perhaps in the end flues in each heating wall.

FIG. 1 is a diagrammatic vertical section taken longitudinally of a coke oven battery employing gun flue feed of rich fuel gas to the base of the vertical flame flues and embodying the features of the present invention as disclosed in greater detail in FIGS. 2 through FIG. 2 is a diagrammatic vertical section taken transversely of the gun flue battery illustrated in FIG. 1 along line IIII thereof;

FIG. 3 is a section taken in the horizontal direction along line III-4H of FIG. 1 through two flues belonging to separate flow groups whereby both flues are oil? or on at the same time and part of the view is cut away to show more clearly the arrangement of regenerator compartments;

FIG. 4 is a vertical section taken transversely through a portion of the coke oven battery near the outer end of the sole flues showing the mechanism for controlling externally the admission of lean gas and/or air and the removal of waste gas;

FIG. 5 is a view partially in section taken along line V-V of FIG. 4;

FIG. 6 is a diagrammatic vertical section taken longitudinally of an underjet battery wherein the features of the present invention are embodied and wherein a section taken along line III-III of this figure would correspond substantially to FIG. 3 and FIG. 7 is a graph displaying several temperature gradients to illustrate the re-distribution of temperatures in the on flues with different apportionments of fluid flow between the high and low ports thereof.

The coke oven battery 10 illustrated in FIGS. 1 and 2 comprises in general a plurality of coking chambers 11 and heating walls 12 that are disposed in alternation progressing in the lengthwise direction along battery 10. Heating walls 12 are made up of a series of vertical flamefiues 13, which are individualized heating chambers, disposed in side-by-side relationship extending crosswise of battery 10.

These vertical flame-flues 13 are arranged in groups in order to provide collective flow of the flame-flues 13 in each group to a common crossover duct 14, whereby the combustion products of each flue 13 flows upward, along horizontal bus flue 16 common to each such group of flues, through duct 14 over the top of coking chamber 11 and down into the corresponding group of flame-flues 13 on the other side of the intermediate coking chamber 11.

Thus, each crossover duct 14 can be considered as connecting two flow groups of flame-flues 13, one of each such pair of connected flow groups receiving for a period the waste combustion gases from the burning operation being conducted in the other group of the pair. At the end of this period the system is reversed and cyclically thereafter the relative functions of these flow groups alternate.

Below the coking chambers 11 in the lower story of the battery 10 are arranged a series of cross-regenerators 17 extending in a direction parallel to the series of vertical flame-flues 13 forming each heating wall 12. These regenerators 17 communicate directly with flame-flues 13 in a particular fashion by means of the novel arrangement to be disclosed in detail below.

This communication between flame-flues 13 and crossregenerators 17 is achieved through port and duct assemblies 18 and 19. In each instance port and duct assembly 19 is shown as a single slot or passage 20 communicating with a single riser duct 21 extending vertically up through the tie walls 22, which together with linear walls 23 of heating walls 12 define the flame-flues 13. This riser duct 21 thereupon communicates with two adjoining flame-flues 13 via high level ports 24 shown in back-toback arrangement in each tie wall 22. In this fashion a pair of opposing ports 24 together provide in each flue 13 the fluid delivery to support burning in the upper region of flue 13. Thus, in effect, each pair of opposing ports 24 is considered a high level combustion device.

The port and duct assemblies 18, on the other hand, comprise in each case the combination of vertical port 26 (shown as circular in cross-section) communicating with plenum chamber 27 in the upper region of chamber 27 with chamber 27 in turn being connected to ducts 28 and 29 which branch off to opposite sides of regenerator walls 31 to communicate with separate regenerators 17.

Regenerators 17 in turn are divided by transverse partitions into large regenerator compartments 32, 32' arranged in alternating relationship respectively with small regenerator compartments 33, 33' progressing crosswise of the battery 19. This alternating arrangement is best shown in FIG. 3.

Depending on whether battery 10 is being under-fired with rich gas or with lean gas, the sole flues will conduct air or combustion gases on the one hand and air, lean gas or waste heat on the other hand. Thus, sole flues 34, 36 always conduct either air or combustion gases (waste heat gases) and sole flues 34, 36' may conduct air or waste heat gases during underfiring with rich gas and lean gas or waste heat during underflring with lean gas. Sole flues 34, 36, 34' and 36' extend crosswise of the battery 10 beneath and parallel to the regenerators 17 communicating therewith through a series of holes 37 extending up through the floor 38 of the regenerators 17. Each sole flue 34 supplies the air passing to regenerator compartments 33 being in communication therewith via holes 37; each sole flue 36 supplies the air entering regenerator compartments 32 being in communication there with through holes 37 each sole flue 34 supplies the air passing to the regenerator compartments 33' thereover and each sole flue 36 supplies the air entering the regenerator compartments 32' in the same fashion.

Considering operation of battery 10 with rich gas underfiring, for example, air will be admitted to sole flue 36 and will pass through those holes 37, which place regenerator compartments 32' into communication with sole flue 36. The volume of chamber 32' is chosen in the initial design to have some specific volume whereby a given quantity of fluid flow (in this case, air) can be assured via port and duct assembly 19 to those high level ports 24 in communication therewith. Since each port and duct assembly 19 services two high level ports 24 arranged in back-to-back relationship and opening into each of two adjacent flues 13, and since each chamber 32' services two such port and duct assemblies 19 (see FIGURE 3), each regenerator chamber or compartment 32 is arranged to supply in part the fluid delivery demands of four separate flues 13. The separate port and duct assemblies 19 (passages 20 and risers 21) are proportioned to draw at equal flow rates from the compartments 32' to which they are connected in common thereby insuring that one fourth of the fluid volume admitted to each compartment 32 will be relegated to each of the flues 13 with which it communicates.

As stated above, only part of the air demand for the high level combustion in each flue 13 is supplied from a regenerator compartment 32. In the simplest arrangement, the fluid flow from each port 24 in communication with a compartment 32' is substantially duplicated by the fluid flow from its counterpart port 24, each of which ports 24 is in communication via a port and duct assembly 19 with a regenerator compartment 32. As shown in FIG. 3 each compartment 32 contributes fluid flow to a pair of flues 13 and so in the simplest arrangement has substantially one-half the volume of each compartment 32. Thus, in the above arrangement half the air for the high level combustion in any given flue 13 during rich gas underfiring will be supplied from each of compartments 32' and 32. If a different ratio of volume of fluid delivery is to be provided for from the two ports 24 facing into each flue 13, this can be provided for by designing compartments 32, 32 with the appropriate ratio of volumes relative to each other or, as will be further developed below, by the exercise of control externally of the battery 10.

Simultaneously air for the low level port 26 in each flue 13 is supplied in part from the regenerator compartment 33 to which it is connected via duct 29 and in part from the compartment 33 to which it is connected via duct 28. In any given flue the full input of air for the low level combustion is supplied in part from compartment 33 and in part from compartment 33. Assuming once more the simplest arrangement wherein compartment 33' has twice the flow volume of compartment 33, then it follows that during rich gas underfiring one half the air required for low level combustion will be supplied from compartment 33', which communicates with four flues 13, and the other half of the air required for low level combustion will be provided via compartment 33, which feeds two flues 13. Whatever the flow volume relationship of compartment 33' to 33, this same flow volume relationship should exist between compartment 32' and 32 in order that this arrangement will provide the requisite capability for apportioning the fluid delivery to the upper region and to the lower region of each flue 13 in a definite selected ratio both during rich gas underfiring and during underfiring with lean gas.

Thus, in the initial design the apportionment of fluid delivery to the lower region of each flame-flue 13 and to the upper region of that same flame-flue 13 can be approximated by fixing the ratio of the separate throughput volumes of delivery to these respective portions of the flue such as for example, in a 40:60 ratio. This is accomplished, in effect, by establishing the flow capacities of the separate paths of fluid delivery throughout their respective lengths to the lower and upper regions of the flues 13 in like proportion; namely in a 40:60 ratio. Assuming the simplest arrangement (2 to 1 ratio) of the available flow volumes of compartments 32' and 32 to each other and of compartments 33' and 33 to each other, such a construction would simply require that the crosssectional areas of sole flues 34, 36 bear a 40:60 ratio to each other; that the cross-sectional areas of sole flues 34', 36 be in a 40:60 ratio to each other; that the available flow volumes of regenerator compartments 33, 32 have the same 40:60 ratio to each other, and that the available flow volumes of regenerator compartments 33, 32', likewise, be in the 40:60 ratio.

In this fashion the gross apportionment of fluid flow between the lower and upper regions may be approximated to meet the known design conditions. Thereafter, for finer adjustment and in order to effect changes in temperature distribution to accommodate those operating conditions discernable only after the battery 10 has been erected and placed in operation, control means are provided for externally adjusting the admission of fluid to and the exit of waste gases from the distribution and heating system via sole flues 34, 36, 34' and 36'.

During the rich gas underfiring, fuel gas is admitted to the base of each on fine 13 via gun flues 51, risers 52 and nozzles 53. In the arrangement shown in FIG. 1 the pair of heating walls 12 to the right side of FIG. 1 are on walls and tfohrepia are on walls and the pair of heating walls 12 to the In a battery 10 designed with an apportionment of air delivery in a 40:60 ratio (40% supplied to lower region of flue 13 and 60% supplied to its upper region) air will be admitted to each high level port 24 partly from a regenerator chamber 32 and partly from a regenerator chamber 32' located on the other side of one of the regenerator pillar walls 31. At the same time that air is admitted to the upper regions of the on flues, air is supplied to the lower or base regions of the on flues via port and duct assemblies 18 each of which communicates both with a regenerator chamber 33 and a regenerator chamber 33 in an adjacent regenerator 17. Thus, the air to support combustion in the lower region of each flue 13 comes in part from a chamber 33 and in part from a chamber 33'.

The delivery of rich fuel gas to the base of each flue 13 is in any event to be such as will provide for the requisite rate of flue combustion both in the lower region and in the upper region of each flue. Assuming that the initial design ratio of 40:60 may be retained without more than a minor re-balancing with the external control means, part of the fuel gas delivered at the base of each flue 13 is burned with the air supplied via port and duct assemblies 18 (about 40%) and the balance (about 60%) of the fuel gas is burned with the air supplied to the upper regions of the flues 13 via port and duct assemblies 19. In this fashion a more uniform temperature gradient is experienced over the vertical extent of each flue 13 with resultant uniform heating of coking chamber 11.

In the off flues 13 of the exemplary construction wherein downwardly-directed combustion gases are received from the on flues 13 the Withdrawal of these gases from off flues 13 to regenerator chambers 32, 33, 32, 33' will be substantially in accordancewith the ratio of supply of air to the on flues; that is, 60% of these waste gases will pass to large chambers 32', 32 of the waste heat regenerators 17 and the remaining 40% of these gases will enter smaller chambers 33, 33 of these regenerators. Sole flues 36' communicating with waste heat regenerator chambers 32'; sole flues 36 connected to waste heat regenerator chambers 32; sole flues 34 communicating with waste heat regenerator chambers 33' and sole flues 34 connected to Waste heat regenerator chambers 33 serve to conduct these waste gases from battery 10 to the waste heat flue.

When battery 10 is underfired with lean gas, heated air and heated lean gas from the appropriate regenerators 17 are delivered to each on flue 13 both in the lower region and in the upper region thereof. Assuming construction of the regenerator chambers and sole flues in the fashion described above to provide an initial 40:60 apportionment of fluid delivery to the lower and upper regions respectively, air will be admitted to sole flues 34, 36 and blast furnace gas from main 39 will be delivered to sole flues 34, 36.

Thus, the fluid delivery to the lower region of each on flue 13 will comprise the combined flows of air from a regenerator chamber 33 via duct 29 and of lean gas from a regenerator chamber 33 via duct 28 with these combined flows comprising about 40% of total fluid delivery to each on flue 13.

Delivery of fluid to the upper region of each on flame-flue 13 on the other hand will comprise the combined flows of air through the one of the two ports 24 which communicates with regenerator chamber 32 via its riser 21 and duct 2 and of lean gas from the other of these ports 24, which port communicates with regenerator chamber 32 via its riser 211 and duct 20. In this fashion about sixty percent of full fluid delivery to flame-fine 13 is allotted to the upper region in accordance with the illustrative design requirements.

The withdrawal of waste gas from the off flues 13 to the waste heat flue will be substantially the same as has been described in connection with rich gas underfiring.

In accordance with this invention, since adjustment in the rate of delivery of air and/ or lean gas and in the rate of removal of waste gases may be required at the option of the operator as, for example, may be made necessary by the different combustion air requirements of the lean gas used for underfiring and since the built-in" design apportionment of fluid delivery to the upper and lower regions of fiues 13 may require re-apportionment in view of the actual operating conditions encountered, the external adjusting means disclosed in FIGS. 4 and have been provided. By this provision the use of conventional internal adjustment of nozzles and plugs is obviated. Such internal adjustment of fluid delivery is cumbersome and lacks sensitivity because of the ditficulty of access and such control is costly because of the attendant down time of the oven.

In the case of the passage of air into the sole flues the external control and adjustment thereof is effected by means of finger bars 38; in the case of the admission of lean gas, such as blast furnace gas from main 39 into the sole flues 34, 36', the external control and adjustment therefor is by means of butterfly valves 41 and 42 located in the feed ducts 43, 44 connecting the lean gas reversing valves 46 to the sole flues 36', 34'. These valves 41 and 42 are shown interconnected by a linkage system 47 whereby these valves are rendered mutually adjustable. Use of linkage system 47 is, of course, optional.

FIGS. 4 and 5 illustrate the relationship of the various adjusting elements for the air, waste heat and lean gas boxes during lean gas underfiring, some of air lids 48 shown in the lifted position. By adding or removing finger bars 38 the entry of air into the sole flues 34, 36 can be reduced or increased. Likewise, turning butterfly valves 41 and 42 with the arrangement of interconnecting linkage 47 as shown will insure that as one such valve 41 and 42 allows an increase in the transmission of lean gas to one of the sole flue 36', 34', the other valve of the pair will decrease the passage of lean gas to the other sole flue with which it communicates.

In the manner well-known in the art the appropriate lids 48 will be opened or closed and Waste heat valves 49 are closed or opened by the action of reversing mechanisms (not shown). In those sole fines for which air lids 48 are closed and waste heat valves 49 are open to transmit the products of combustion to the waste heat flue, the extent of outward flow is controlled by the regulating quadrant valves 59. Adjustments to change the infiow of air to the sole fiues and/or to change the inflow of lean gas thereto require that the outflow of the products of combustion also be adjusted. Such adjustment is effected by re-positioning the waste heat quadrants 50 and by adjusting the stack damper and regulator (not shown) thereby to alter the stack draft in the waste heat flue.

As is evident in FIG. 6, this invention is equally applicable to other oven constructions. The battery shown in FIG. 6 is an underjet-fired version of battery wherein,

the essential difference in the construction lines in the anode of delivery of rich fuel gas to the base of the on flame-fines 13. The gun flue construction shown in FIG. 1 is shown replaced by the underjet risers 61 together with the conventional waste gas recirculation ducts 62.

The cycles of operation described above for rich and lean gas underfiring would remain the same. Also regenerator chambers 32, 33, 32' and 33' may be allotted any desired initial design ratio of available flow volumes with sole flues 34, 36, 34', 36' having similarly proportioned flow capacities. Further, the same arrangement of external adjusting elements as is shown in FIGS. 4 and 5 may be used to reapportion the fluid flow to compensate for operating conditions not included in the design parameters.

The curves shown in FIG. 7 reflect data obtained from tests conducted in an 18-foot high experimental coke oven flue wall. As is shown in FIG. 7 by the use of the present invention, when underfiring 'with rich gas, the ratio of air flowing to high and low level ports can be re-apportioned by external adjustment of the control means hereinabove described to obtain optimum temperature distribution along the vertical height of the flame fines. In the particular installation tested the data developed showed that increasing the percentage of air to the high level ports reduced the temperature differential AT between the lower and upper portions of the flame flue. This series of curves serves, therefore, to illustrate the effectiveness of the external adjusting means as a mechanism for obtaining optimum heat distribution along the vertical extent of the flame flue.

It should be understood, of course, that the foregoing disclosure relates to only one embodiment of the invention and that numeruos modifications or alterations in the relative sizes or arrangements of regenerator chambers, distribution and external control facilities to achieve various selected ratios of apportionment of fuel delivery to the upper and lower regions of each on flue may be made wtihout departing from the spirit and the scope of the invention as set forth in the appended claims.

Iclaim:

1. In a regenerative coke oven battery having high chambered coke ovens the combination comprising,

an elongated coking chamber extending crosswise of said battery,

said coking chamber having elongated heating chambers on opposite sides thereof,

spaced transversely extending walls in said heating chambers forming a plurality of separate heating fines,

first and second regenerators extending crosswise of said battery beneath said coking chamber in spaced parallel relation with each other, said first regenerator having transversely extending walls forming a first regenerator compartment and a second regenerator compartment, and

said transversely extending walls of said regenerator compartments being intermediate each of said transversely extending walls of said heating chamber,

passageways connecting said first regenerator compartment with a high level burner in each of a pair of adjacent heating flues on one side of said coking chamber and with a high level burner in each of a pair of adjacent heating flues on the other side of said coking chamber so that said first regenerator compartment is arranged to supply fluid to four high level burners in four separate heating fines.

2. A regenerative coke oven battery as Set forth in claim 1 which includes a second compartment in said first regenerator, and

passageways connecting said second regenerator compartment with the low level burner in a pair of adjacent heating flues on one side of said coking chamber and with the low level burner in a pair of adjacent heating flnes on the other side of said coking chamber so that said second regenerator compartment is arranged to supply fluid to four low level burners in four separate heating flues. 3. A regenerative coke oven battery as set forth in claim 2 in which said first regenerator compartment and said second regenerator compartment are arranged to supply fluid respectively to a high level burner and a low level burner in the same heating flue. 4. A regenerative coke oven battery as set forth in claim 1 which includes transversely extending spaced walls in said second regenerator forming a third regenerator compartment and a fourth regenerator compartment passageways connecting said third regenerator compartment with a high level burner in each of a pair of heating flues on one side of said coking chamber so that said third regenerator compartment is arranged to supply fluid to a pair of high level burners in separate heating flues. 5. A regenerative coke oven battery as set forth in claim 4 in which said first regenerator compartment and said third regenerator compartment are arranged to supply fluid to separate high level burners in the same heating flue. 6. A regenerative coke oven battery as set forth in claim 4 which includes passageways connecting said forth regenerator compartment with a low level burner in each of a pair of heating flues on one side of said coking chamber 5 claim 1 which includes so that said fourth regenerator compartment is arranged to supply fluid to a pair of low level burners in separate heating flues.

7. A regenerative coke oven battery as set forth in References Cited UNITED STATES PATENTS Otto 202141 Davis 202141 Otto 202- Van Ackeren 202141 Van Ackeren 202143 Van Ackeren et a1. 201-451 XR NORMAN YUDKOFF, Primary Examiner.

WILBUR L. BASCOMB, Examiner.

DAVID EDWARDS, Assistant Examiner. 

